The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 2012
Filed:
Aug. 30, 2004
Yasufumi Takahashi, Kobe, JP;
Hiroyuki Fujimoto, Kobe, JP;
Akira Kinoshita, Kobe, JP;
Shingo Tode, Kobe, JP;
Ikuro Nakane, Kobe, JP;
Shin Fujitani, Kobe, JP;
Yasufumi Takahashi, Kobe, JP;
Hiroyuki Fujimoto, Kobe, JP;
Akira Kinoshita, Kobe, JP;
Shingo Tode, Kobe, JP;
Ikuro Nakane, Kobe, JP;
Shin Fujitani, Kobe, JP;
SANYO Electric Co., Ltd., Osaka, JP;
Abstract
A nonaqueous electrolyte secondary battery which has a positive electrode containing lithium cobalt oxide as a positive active material, a negative electrode containing a graphite material and a nonaqueous electrolyte solution containing ethylene carbonate as a solvent and which is charged with an end-of-charge voltage of at least 4.3 V. Characteristically, the battery uses, as the positive active material, lithium cobalt oxide obtained by firing a mixture of a lithium salt, tricobalt tetraoxide (CoO) and a zirconium compound and having particle surfaces onto which the zirconium compound adheres.